Success PC Port output on HVL-F7S (Sony NEX) without PREFLASH!!!

Started May 21, 2012 | Discussions thread
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perez69 Regular Member • Posts: 182
Re: Success PC Port output on HVL-F7S (Sony NEX) without PREFLASH!!!

fabianbono wrote:

perez69 wrote:

j13l wrote:

Great idea.

But, the use of an opto-isolator would be safer for the camera. (eg MOC3030 + a resistance for LED)
Some flash have high voltages. http://www.botzilla.com/photo/strobeVolts.html

Thank you for your search.

In this case how will change the circuit?

The circuit is a little different.
Im thinking on do the V2 using some opto.

For your better reference, you can see this circuit that actually I modify my old Braun flash.

The optoisolator saves your camera and trigger the Triac that handle the high voltage.
Check this site.

http://www.carlmcmillan.com/Optoisolated_Adapter.htm

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Thanks!
Do I need the SCR? My (mainly) use is to drive a wireless trigger.
If I attach a flash unit directly to the pc port do I need this SCR?

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